Add, and update, documentation build targets.

doc/Jamfile.v2

@@ -1,4 +1,4 @@
-#   Copyright (c) 2001 Jaakko Järvi
+#   Copyright (c) 2001 Jaakko J�rvi
 
 #   Distributed under the Boost Software License, Version 1.0.
 #   (See accompanying file LICENSE_1_0.txt or copy at
@@ -29,3 +29,9 @@ boostbook standalone_tuple
         # How far down we go with TOC's
         <xsl:param>generate.section.toc.level=0
      ;
+
+###############################################################################
+alias boostdoc ;
+explicit boostdoc ;
+alias boostrelease : standalone_tuple ;
+explicit boostrelease ;